way too cold for napa. way too cold. >> reporter: the freezing temps kept public works crews busy as pipes and a water main burst this morning. the city sending out tweets alerting residents to take precautions. >> as the cold weather has had a cumulative effect from night tonigt tonight, there's the potential we could have some more breaks in the lines. >> reporter: the fountain flowing now, but take a look at it this morning when the mercury plunged. >> to get into the mid 20s is what what we would normally see. to get below 20 last night is very unusual. >> reporter: if you have to be outside tonight, this is definitely the place to be. the only thing i'm missing is that cup of hot cocoa. i'm jody hernandez, nbc bay area news. >>> from the north bay to the south bay, it is just cold. the cold had people rushing into auto repair shops. >> reporter: the temperature in san jose has dropped two degrees in just the past hour. it's 50 degrees. let's give it a second. 50 degrees. we are in for a cold night. mos